Automatic slide-valve gas and air blowpipe for soldering, &amp;c.



IATENTED NOV. 1, 1904 J. L. LE MAN. AUTOMATIC SLIDE VALVE GAS AND AIRBLOWPIPE FOR SOLDERING, &c.

APPLIOATION FILED OUT. 12, 1903.

NO MODEL.

UNTTED STATES Patented November 1, 1904.

PATENT OE TcE.

AUTOMATIC SLIDE-VALVE GAS AND AIR BLOWPIPE FOR SOLDERING, &C.

SPECIFICATION forming part of Letters Patent No. 774,089, dated November1, 1904.

Application filed October 12, 1903.

To all whom it may concern:

Be it known that 1, JOHN LOUIS L13 MAN, a subject of the King of GreatBritain and Ireland, and a resident of Sunbury-on-Tha'mes,

in the county of Middlesex, England, have invented a certain new anduseful Automatic Slide-Valve Gas and Air Blowpipe, of which thefollowing is a specification.

My'invention consists of a blowpipe comprising a lower or maingas-supply tube bent at one end to form a convenient handle and havingtwo holes made upon the upper surface of its opposite end and the waystopped between these holes, an upper tube stopped 5 at one end fixedupon the lower main tube and having upon its surface two correspondingholes, an inner tube stopped at both ends, so as to form a chamber thattelescopes into and moves freely within the upper tube and has twocorresponding holes upon its surface, and a smaller tube that is fixedupon the main tube to supply the air-blast. Upon one end of thisinnertube is a thumb-rest, and its other end is acted upon by a helicalor other 5 suitable spring which tends to move the inner tube or chamberso as to shut ofi the gas. The supply of gas and the intensity of theblast is regulated by sliding the inner tube against the action of thespring by means of 3 the thumb-rest. Apilot-light is provided for by asmall stop-cock fixed in or upon the main or lower tube.

In order that my invention may be clearly understood, a full descriptionof the same is hereinafter made with reference to the example ofapparatus in accordance therewith shown in the drawings accompanyingthis specification.

In the drawings, Figure 1 is an elevation 4 of the complete blowpipe.Figs. 2 and 3 are respectively a longitudinal and a transverse sectionof the same. Figs. 4:, 5, and 6 are respectively a perspective View, alongitudinal sectional view, and a transverse section of a saddle forsupporting the tubes. Fig. 7 is a plan of the thumb-rest, shown also inFig. 2. Fig. 8 is a transverse section of the same on the dotted line inFig. 7, and Fig. 9 is a plan of the upper tube or valve casing.

The main gas-tube D,Figs. 1 and 2, is bent $erial N0- 176 .'789. (N0model.)

at one end to form a convenient handle, and through the upper surface ofits opposite end two holes are drilled at a distance from each other tocorrespond with the two holes a e in the saddle B. (Shown in section,Fig.

In the main gas-tube D, between the two holes therein, there is inserteda plug F, that stops the gasway and has a small hole drilled through itlongitudinally to form a gasway for a pilot-light that is controlled bya small cock Gr, Figs. 1 and 2.

An extension H of the main gas-tube Dhas brazed to one of its ends thatis downwardly bent a vertical nozzle I. The other end of the extensionH, which is straight, is inserted in the tube D, so as to rest againstthe stop F.

The vertical nozzle I is at its'upper end screw-threaded to receive ascrew-plug J and also a thinner screw-plug K. The lower end of thevertical nozzle I is screw-threaded to receive a screw-threadednozzle-cap L.

The saddle B is fixed between the main gastube D and the upper tube O,as shown in Fig. 3, and has two holes a c drilled through it, as shownin section in Fig. 5. The distance between these two holes, as alreadystated, corresponds with that between the two holes in the main gas-tubeD, Fig. 2.

The upper tube C is stopped at one end and is fixed upon the saddle B,as shown in Figs. 80 1, 9., and 3. It has two holes drilled through itslower surface at a distance from each other equal to that between thetwo holes (2 c in the saddle B, which they are arranged to overlap.

An inner tube or valve 122. slides freely within the tube C and has twoholes drilled through its lower surface at a distance from each othercorresponding with the distance between the two holes in the tube O.This tube on is stopped at one end by the plug end n, Fig. 7, of thethum b-rest a and at the other end beyond the second hole from thethumb-rest by the insertion of a disk O, Fig. 2. Between the end of theplug 02 and the disk 0 there is thus formed a chamber into which gas canpass.

A helical spring V, contained between the disk O and the stopped end of,the tube O, presses against the sliding tube on, and' thus tends to shutoff the gas.

The range of movement of the sliding tube IO0 tion of a screw-threadedcap R and has in its interior an antifriction-ball which makes contactwith the slide-tube m through a small 5 hole drilled in the tube C. eredby a disk f, and between this disk and the top of the screw-cap R is ahelical spring a, which presses the disk against the ball s, the ball 5against the slide-tube m, and the slide-tube m against the tube C, so asto maintain the adjoining surfaces of m and C in gas tight contact.

The air-tube '21-, Figs. 1, 2, and 3, is held in position bylugs X uponit and upon the tube D. These lugs are held together by a screw Y, thatpasses through them.

The vertical end of the air-tube '10 passes through holes drilled in thetwo screw-Mugs J and K and has fixed upon it a washer or ring of metalZ, which is adapted to be contained in the space between J and K. Thisspace is packed with asbestos or other suitable material wound round thetube w, so as to prevent any escape of gas between this tube and thescrew-plug J.

The vertical end of the air-tube w is screw threaded for the receptionof a screw-threaded nozzle O 0.

By releasing the screw Y from the lugsX X on the tubes D 1 and thescrew-plug J from the nozzle I the whole of the air-tube 1/; may readilybe detached. By removing the screwpin P the slide-tube m and the helicalspring V are readily removed from the tube C. By removing the screw-capR from the boss Q the helical spring w, the disk 6, and theantifriction-ball may be removed. All the parts of the apparatus canthus be taken apart for cleansing, lubricating, or repair.

The supply of gas corresponding to the size I of flame required isregulated by pushing the slide-tube 121 into the tube C by means of thethumb-rest a, the holes in the tube D, the

saddle .B, the tube C, and the sliding tube m acting as inlet and outletports for the gas.

Having now described my invention, what I claim as new, and wish to haveprotected by Letters Patent, is as follows:

1. A blowpipe comprising an air-tube; a main gas-tube; a tubularvalve-chamber closed I at one end, mounted on said gas-tube, and havingcommunlcation through two holes with the interior thereof; in the saidmain tube a stop or diaphragm located between said holes; 3

within said valve-chamber a tubular valve adapted to be slid therein andhaving formed in it two holes at a distance apart equal to that betweenthe aforesaid holes in the valve-chamber; within the valve-chamber aspring adapt- The ball 3 is cov.

l ed to eject the valve therefrom; and means for sliding the valve inits chamber against the action of the said spring.

2. A blowpipe comprising a main gas-tube having formed therein twoholes; in said tube a stop located between said holes; a saddle jmounted on said tube, and having formed therein holes contiguous toaforesaid holes l therein; a tubular valve-chamber closed at l one end,mounted on said saddle, and having formed therein holes contiguous tothe holes aforesaid; within said valve-chamber aspring, and a tubularvalve that is adapted to be moved against the action of said spring andis furnished with a pair of holes at a distance apart equal to thatbetween the holes in the valvechamber; means whereby said valve can bemoved by hand; a nozzle on said main tube; an air-tube one end of whichis adapted to enter said nozzle; a pair of screw-plugs adapted to bescrewed into said nozzle; on that end of the air-tube that is adapted toenter said nozzle a washer or ring adapted to be clamped between saidscrew-plugs; on the other end of the airtube a lug; on the main tube acorresponding lug; and means for connecting together and fordisconnecting said lugs.

I 3. In a blowpipe a main gas-tube having a nozzle formed at one endthereof; an air-tube one end whereof is adapted to be inserted into 5said nozzle; means for adjusting and securing said end within saidnozzle comprising a pair I of screw-plugs adapted to be screwed intosaid nozzle; on said end a washer or ring adapted to be clamped betweensaid plugs; and means for controlling the gas-supply comprising a ivalve-chamber mounted on said main gas-tube l and having portsincommunication therewith; l a slide-valve within said valve-chamberadapted to be slid therein; and a spring adapted to eject said valvefrom said valve-chamber. I 4. In a blowpipe a main gas-tube havingtherein astop; a valve-chamber furnished with l ports that communicatewith the interior of 1 said. tube on opposite sides of said stop; and aI hollow valve that is adapted to be slid within i said chamber and isfurnished with ports that l communicate with the interior of said valveand are adapted to overlap the ports in the f valve-chamber. 5. In ablowpipe a main gas-tube, within said tube a stop or diaphragm thatdivides it into two portions connected by a bypass; a i cock adapted toclose said by-pass; a valvef chamber furnished with ports thatcommunicate with interior of said main tube on oppol site sides of saidstop; and a hollow valve that l is adapted to be slid within saidchamber and l is provided with ports that communicate with i theinterior of said valve and are adapted to l overlag the ports in saidvalve-chamber. l

said tube a stop or diaphragm wherein is :1 formed a bypass; in saidstop a cock adapted l to close said by-pass; a valve-chamber fur- 6. Ina blowpipe a main gas-tube; within nished with ports that communicatewith interior of said main tube on opposite sides of said stop; and ahollow valve that is adapted to be slid within said chamber and isprovided with ports that communicate with the interior of said valve andare adapted to overlap the ports in said valve-chamber.

7 A blowpipe comprising a main gas-tube; an air-tube; a valve-chamber; avalve adapted to he slid within said valve-chamber; and a saddle-piecethat is adapted to support said valve-chamber and air-tube, and has itssurfaces hollowed or grooved, to conform respectively to the maingas-tube, the valve-chamber, and the air-tube aforesaid.

8. In a blowpipe a main gas-tube; an airtube, a valve-chamber havingports therein; within said valve-chamber a valve adapted to he slidtherein and furnished with ports, and a spring that tends to eject thevalve from said chamber; a pin-and-slot device that limits the travel ofthe valve and prevents its expulsion from the valve-chamber by saidspring; and means comprising a threaded cap, a spring, a disk, and afriction-ball, whereby the portions of the surfaces of the valve-chamberand the valve in proximity to the ports are maintained in contact witheach other.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN LOUIS LE MAN.

Witnesses:

H. CLAY EVANS, ALFRED NUTTING.

